The notable characteristics of weak power grid areas are:
Small power system capacity, poor grid stability, and unbalanced supply and demand; frequent load shedding (unplanned power outages) or large load switching triggering upstream relay protection. This situation has caused serious economic losses to mining operations such as production line shutdowns, equipment damage, and reduced production capacity.
This solution directly connects the energy storage system to the medium-voltage line. When the grid is abnormal, the grid-side load is disconnected through the fast switching device, and the energy storage system quickly switches to off-grid mode to provide uninterrupted power supply to the load. After the grid returns to normal, it switches back to grid-connected mode for energy storage, thus solving the problem of unified power protection for large loads in such scenarios.
